\begin{table}%t3
\caption{\label{t3}Position (in~cm$^{-1}$) of the strongest band in the 6.2~$\mu$m region for coronene.}
%\centering
\par
\begin{tabular}{lc}
\hline\hline
\noalign{\smallskip}
Form    & Calc\tablefootmark{1} (Exp)\\
     %    &~cm$^{-1}$   \\
\hline
PAH$^{+}$    &  1555 (1533)\\
H$^{+}$PAH   &  1591 (1588)\\
PANH$^{+}$   &  1548 (...)\\
H$^{+}$PANH  &  1597 (...)\\
\hline
\end{tabular}
\tablefoot{\tablefoottext{1}{Frequencies calculated at the B3LYP/6--311G(d,~p) level and scaled by 0.9679.}}
\end{table}